PHOENIX (AP) — A Maricopa County Superior Court judge has set a trial date for an Arizona mother whose baby has been missing nearly a year.

Elizabeth Johnson is set to go on trial May 9 in Judge Paul McMurdie's courtroom. The Superior Court says the trial is likely to last three weeks.

Johnson was found competent to stand trial in September.

Johnson has pleaded not guilty to charges of kidnapping, child abuse, and custodial interference in the disappearance of her son Gabriel, who was 8 months old when he was last seen in December in San Antonio.

Police don't know whether the boy is alive.

Tempe police say Johnson originally claimed she killed the baby and later said she gave the child to a couple in San Antonio.